Ivan IV AKA Ivan the Terrible was the Grand Prince of Moscow from 1533 to 1547 CE.
The president of the United States serves as the chairman of the National Security Council (NSC). This agency was created by President Truman’s in 1947 in order to address tensions between Soviet Union and the United States. Its function is to advise the president on national security issues as well as foreign policy issues.
The rest of the federal agencies do not have the president of the US as their chairman.
Each branch is to make sure the other branches dosnt get to much power
Korea didn't split until 1948